Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6e35a6a1e12ea0…

MALICIOUS

PDF

84.4 KB Created: 2021-09-20 14:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 66dc38a279564b80b5412c6433971ed3 SHA-1: 57039b83212ef8ffac8bdcda2179f7e675de91a5 SHA-256: ce6e35a6a1e12ea0cbe789f42516e53ab09d8675943d555e859401c4b2e6324b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://synerhu.ru/uplcv?utm_term=fpse+for+android+download PDF link annotation
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161301a1dc318f---totirux.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/lafopanifugasovawanokojid.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/37143120001.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/gaworare.pdfIn PDF document text
    • http://sp2wronki.pl/fotki/fotki/file/welologexivozurodawi.pdfIn PDF document text
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/rojafad.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/96555643504.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614853f808a9a---tajokazafiwotevi.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/69159970643.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/novirojanazu.pdfIn PDF document text
    • http://faisaltowel.com/survey/userfiles/files/raduj.pdfIn PDF document text
    • http://wernitznigg.at/files/52326011154.pdfIn PDF document text
    • https://anninhsieuthi.online/upload/files/82309015945.pdfIn PDF document text
    • http://bdsductri.com/upload/files/zolalisufarojanazubab.pdfIn PDF document text
    • https://vicareyou.com/userfiles/file/13508965575.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16139fc6d73074---96330656869.pdfIn PDF document text
    • https://digicpictures.com/downloads/visolikafemiwuxaduro.pdfIn PDF document text
    • http://studiostocchi.eu/userfiles/files/jukuboxesixani.pdfIn PDF document text
    • https://regenerateacademy.com/file/9568430322.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210919135621.pdfIn PDF document text
    • http://tehla.eu/userfiles/file/24286223201.pdfIn PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/52499099945.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/8p6vvg3plo1nurjg8qfmc09qk5/57997973051.pdfIn PDF document text
    • https://www.informacion-indoorclub.com/boletines/img/file/24797047649.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/razelevidifa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1C 19164 bytes
SHA-256: 41193f05afa3a482a382e1cc759640f00f3e140ac167b071c3bb0475863e222e
font_02_sfnt_off00012c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C8F 10456 bytes
SHA-256: 3180b36fa7b7e22028b5adb9d53b7608748694e894fb1130f75d315dfb725530

Open this report in the interactive analyzer, or submit your own file for analysis.